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KV331 Audio was founded in 2012 by a dedicated team of engineers, musicians, and sound designers with the sole purpose of providing high-quality virtual instruments for musicians globally. Its flagship soft synth, SynthMaster, has over 24,000 licensed users in over 110 countries and received numerous awards from prestigious music technology publications around the world; while walking away from MusicTech Magazine's 2016 Gear Of The Year awards as a Gold Award Winner in the 'Best Software Instrument/Sample Library' category, MusicRadar readers recently ranked it number one in their '50 best VST/AU plugin synths in the world today' survey.

Products by KV331 Audio

Latest reviews of KV331 Audio products

SynthMaster 2

Reviewed By Milkman [all]
July 5th, 2023
Version reviewed: 2.9.16 on Windows

After nearly 2 years of experience with Synthmaster 2 and with the dev, KV331, I have decided to revise my review and drop it to 1 star. I wont be working with KV331 any longer.

Synthmaster 1 and 2, and soon 3, sound very nice and offer a lot of presets. When I originally purchased SM2, I knew it was buggy and had many longstanding issues (you can read about those issues on the KVR forums, inside the KV331 forum), but I chose to support the dev and try it out anyway.

I immediately noticed that SM2's modwheel did not work unless I clicked it onscreen, and the "midi learn" feature would crash the plugin in Cubase. Manual assignment within SM2 also failed. I tried various ways to fix this including reaching out to the dev, but I was never able to solve it and the dev ignored my questions.

Recently the dev emailed all customers about Synthmaster3, and offered a new upgrade deal. I considered this, but wanted to make sure the modwheel issue was resolved before spending more $$, so I asked questions on the dev's forum here on KVR. The issue was denied, it was blamed on Bitwig (I started using Bitwig 6 months ago), and then finally it was very curtly blamed on VST3.

In the end, I have no idea if this issue still exists in SM3, but it certainly exists in SM1 and 2 and I am not interested in working with this developer anymore. The responses to my questions and then later to my frustration were inappropriate and dishonest, and I dont have time or patience for dishonest devs. Im done with KV331.

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SynthMaster One

Reviewed By digitalboytn [all]
December 9th, 2022
Version reviewed: 1.5 on Windows

Bulent has a passion for making great synths and it really shows in his work...

SynthMaster 2 is an indispensable workhorse for me after many years of use...

Recently, I started adding SM One to the mix and I'm embarassed that it has been sitting idle for so long, because this synth sounds great...

It has a lot of the goodness of SM 2 in a stripped down format but it is still very powerful, with each section having plenty of options...

The oscillators can load single cycle or WT, and it has two sub oscillators for AM, FM and PM etc...

The filters, modulation and effects sections are all very good and it's easy to program this synth because it's laid out so logically ..

One of the things I like about Bulent's synths is that you can save the modules as presets which makes it a dream to assemble your own programs out of the individual presets...

The best part about SM One is the sound and just like SM 2, it sounds beautiful...

Put all of the elements together and it can be anything you want - from analog to digital...

Some peeps tend to look down at the KV331synths and think that because of their lower price point, that they must be inferior to many of the other synths available...

But make no mistake...

SM One and SM 2 are killer synths that are as good as anything out there and the're easy to program and sound great...

And that folks, is the bottom line...

4.5 Stars for SM One and a gazillion stars for SM 2.

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SynthMaster Player

Reviewed By neeg2000 [all]
August 3rd, 2022
Version reviewed: 2.7 on Windows

Very easy to use. It has a lot of presets and almost of them are useful.

If you don't have any synth, get this.

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SynthMaster One

Reviewed By kevingriffin [all]
July 23rd, 2022
Version reviewed: 1.3.0 on Windows

Dear Potential Buyer,

The KV331 Audio Synthmaster One is a terrific synth with a lot of exemplary features and tremendous sound that gives your composition that right evolutionary style.



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SynthMaster One

Reviewed By inception8a [all]
July 11th, 2022
Version reviewed: 1.5.2 on Windows

A great all around one page wavetable synth with an easily accessible and well laid out interface that has a alot of capabilities to produce common and uncommon sounds.

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SynthMaster One

Reviewed By patrice19 [all]
July 9th, 2022
Version reviewed: 1 on Mac

très bon synthé virtuel : de bonnes basses, de bons leads et de bon Pads.

très complet et facile à paramétrer.

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SynthMaster Player for iOS

Reviewed By yeskeys [all]
July 3rd, 2022
Version reviewed: 1 on iOS

I could give five stars --- but, in the iOS version, I cannot get SM to sync to MIDI clock. I know I'm sending MIDI clock to my interface - I've tried a couple - but cannot get them to sync and percolate together. What am I missing?

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SynthMaster 2

Reviewed By Faydit [all]
April 27th, 2022
Version reviewed: 2.0 on Windows

One of the best sounding and most flexible synthesizer plugins, which I know.

Almost too many features, but of course you do not need to use them all, alone the existing presets sound very good. I've also bought some more vintage based expansions, which also up to now did not disappoint me.

More than fair price for the quality and features.

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Timeline of Latest Product Changes [view all]

Latest News from KV331 Audio

Latest Videos from KV331 Audio

Latest Forum Posts in the KV331 Audio forum @ KVR

SynthMaster 2.9.9
by KIMCHRISTOPHER at 13 Apr 2024, 13:09
Vos astuces pour maîtriser SynthMaster ?
by AxelleGillet789 at 4 Apr 2024, 00:16
Synthmaster 2 - memory leak (windows)
by robert_p at 3 Mar 2024, 12:22
Is the Synthmaster One public user library still available?
by concealed identity at 11 Feb 2024, 20:08
How to reach our support
by avw555 at 3 Feb 2024, 06:33
Synthmaster 3
by Ou_Tis at 12 Jan 2024, 12:16
SynthMaster 3 development updates
by DarkS474 at 6 Jan 2024, 05:19
Synthmaster 2.9.11 iOS crashes all the time!
by Milkman at 28 Dec 2023, 14:44
Stuck notes / panic button not working
by KennyTheWhale at 27 Dec 2023, 21:24
Synthmaster One Preset Walkthrough
by osmancigil at 17 Dec 2023, 13:02
Keyboard Split questions
by Parseq at 14 Nov 2023, 06:04
Synthmaster One - Partial Presets Causes Crash
by falcon14 at 8 Nov 2023, 09:30
Synthmaster Pack 6000 presets
by VELLTONE MUSIC at 21 Oct 2023, 22:58
Bug with assigned envelopes in Synthmaster 2.
by igorius at 18 Oct 2023, 06:06
Synthmaster 1&2 iOS Midi Lean issues
by skarabee at 2 Sep 2023, 08:52